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要旨
スネアを用いた従来のEMRは比較的短時間,かつ安全に施行でき,側方発育型大腸腫瘍(IIa集簇型およびIIa非顆粒型)に対する標準的な内視鏡治療手技である.当科ではその治療方針を腫瘍径・肉眼型で区別している.すなわち,内視鏡的に良好な視野が確保可能であれば,30mm未満の病変については技術的に一括切除可能病変と考え,IIa集簇型・IIa非顆粒型のいずれの肉眼型に対しても一括切除を試みている.また30~60mmのIIa集簇型には計画的な分割切除を行っている30mm以上のIIa非顆粒型はsm浸潤の可能性が高率であり,60mm以上のIIa集簇型に関しては技術的にスネアEMRの限界と考え,これらに対しては腹腔鏡下腸切除術を選択している.スネアEMRは新しいデバイスの使用,局注液,治療手技の工夫により,大きな病変であっても一括切除率の向上が期待できる.当科での治療手技の実際と成績について述べる.
Endoscopic mucosal resection is a standard resection method which is quickly and safely performed for laterally spreading tumors. We select our therapeutic policy by examination of the tumor form (granular type or non-granular type) or tumor size. If we can see the whole tumor, we can perform almost en-bloc resection of a tumor with a diameter under 30mm, whether granular type or non-granular type. However, although piecemeal resection is necessary for granular type lesions ranging from 30mm to 60mm, we can not perform endoscopic resection of non-granular type lesions with a diameter over 30mm, or of granular type lesions with a diameter over 60mm. In these case we use laparoscopic surgery. This is because non-granular type lesions with a diameter over 30mm have often invaded the submucosa and endoscopic resection of granular type lesions with a diameter over 60mm is beyond our capabilities. Endoscopic mucosal resection using a snare device or techniques and solutions for submucosal injection, can be effective for most large lesions. Our paper introduces our technical procedures and results of endoscopic resection.
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